Thought is being given to
experiments and perhaps usage of gear
lubricants in each of the above states. Application will be found for
both gases and
solids as gear lubricants, the
major portion of operating gears
in the future
will continue to be lubricated
with fluids.
Naturally these fluids will be improved
for many applications. For such purpose, the first thought concerns synthetics.
However, the abundance and relative cheapness of petroleum oils rules out
synthetics for most application in the immediate future. It can be expected
that mineral oils will continue to be upgraded
by greater selectivity , more chemical
processing, and use of improved additives.